Penis won't grow!!!

I am a male age of 17. sems I was only 10 my penise has not grown yet! It is still only about 1 inch longer in a ipod touch on hard on soft maybe 1 inch. Well from what I read it shuld start to grow at 16 and stop arounf 19-20, But MIne has not. I Have been in puberty seems about 11. I have pubs., armpit hair, and ancne. I can tell I'm near the end of my puberty cause my acne Id slowing down, But I still get it on my back an chest. I just want help with this. Please help.

Have you talked to a doctor about it? You may have a hormonal imbalance. However, if the other milestones of puberty are being passed, I'm sorry to say you may just be small. It's really not that big of an issue if that's the case. As they say, it's not how big it is, it's how you use it that counts!